Thank you so much for the comments! I may end up implementing the changes and taking the game further. You're right about the lack of feedback, I didn't have time for it though it was planned!
You could have seen the red markings if you would've managed to destroy your ship. After an unsuccessful expedition the starting screen shows the statistics and upgrades you've collected. It was meant as a roguelike where you would see your ship getting more and more upgraded after each playthrough. But I didn't manage to add enough content for it to become actually visible enough. Sorry about that :)